Well the best woofer i've seen in my life time is MTX Audio JackHammer T9922, JackHammer is the most enormous, mind-blowing subwoofer ever created. You will literally not believe it until you see it. Standing in at 23” tall, 369 pounds, and with 12,000 watt peak music power handling, you will be hard-pressed to find something that will get in the ring with this heavyweight.World's most powerfull & proffesional subwoofer for cars, It can even shake the building EASILY, But its price can be more then 5,00,000 (Five Lakhs) & dealers can get one for you in pakistan, there's no need to worry about importing it, just book your order & get it, If you want to have a look go to http://www.mtx.com/caraudio/products/subwoofers/jackHammer.cfm ... Good Luck dow.